Power management for modulated backlights
First Claim
Patent Images
1. A display, comprising:
- a premodulator device including a plurality of individually controllable light sources and being configured to produce a first modulated light according to an image to be displayed, each of the individually controllable light sources being associated with at least one of a plurality of regions of the image to be displayed;
a primary modulator device illuminated by the first modulated light and configured to further modulate the first modulated light to produce further modulated light carrying the image to be displayed; and
a controller coupled to the premodulator device and the primary modulator device, the controller being configuredto evaluate image data representative of the image to be displayed to determine power information associated with each of the regions,to compare the power information to a threshold power value, andwhen the power information indicates an exceedance of the threshold power value, to reallocate power within the premodulator to implement a change in brightness of an area of the first modulated light associated with a particular region and to change modulation by the primary modulator device to accommodate the reallocation of power by the premodulator; and
whereinthe controller reallocates power by selectively decreasing the brightness of at least one area of the first modulated light and selectively increasing the brightness of another area of the first modulated light; and
an aggregate brightness of the first modulated light is decreased.
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Abstract
Power levels of a backlight are adjusted in a number of ways and based on a number of criteria. The adjustments result in a lower power consumption and, in some cases, may enhance audience attention to important objects in a scene. The adjustments comprise, for example, a combination of ramping down power (lowering final display brightness) in concert with corresponding compensatory LCD adjustments (increasing final display brightness). The adjustments may also include, for example, system dimming after ramp down/LCD adjustments are exhausted, or the shifting of an LDR2HDR curve.
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Citations
20 Claims
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1. A display, comprising:
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a premodulator device including a plurality of individually controllable light sources and being configured to produce a first modulated light according to an image to be displayed, each of the individually controllable light sources being associated with at least one of a plurality of regions of the image to be displayed; a primary modulator device illuminated by the first modulated light and configured to further modulate the first modulated light to produce further modulated light carrying the image to be displayed; and a controller coupled to the premodulator device and the primary modulator device, the controller being configured to evaluate image data representative of the image to be displayed to determine power information associated with each of the regions, to compare the power information to a threshold power value, and when the power information indicates an exceedance of the threshold power value, to reallocate power within the premodulator to implement a change in brightness of an area of the first modulated light associated with a particular region and to change modulation by the primary modulator device to accommodate the reallocation of power by the premodulator; and
whereinthe controller reallocates power by selectively decreasing the brightness of at least one area of the first modulated light and selectively increasing the brightness of another area of the first modulated light; and an aggregate brightness of the first modulated light is decreased. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. In a display including a premodulator device and a primary modulator device, a method including:
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evaluating image data representative of an image to be displayed to determine power information associated with portions of the premodulator device associated with at least one of a plurality of regions of the image to be displayed; comparing the power information to a threshold power value to determine whether the power information indicates an exceedance of the threshold power value; and when the power information indicates an exceedance of the threshold power value, reallocating power within the premodulator device to implement a change in brightness of an area of the primary modulator device illuminated by the premodulator device and to change modulation by the primary modulator device to accommodate the reallocation of power by the premodulator device; and
whereinthe step of reallocating power within the premodulator device includes reallocating power to selectively decrease the brightness of at least one area of the primary modulator device illuminated by the premodulator device and to selectively increase the brightness of another area of the primary modulator device illuminated by the premodulator device; and an aggregate brightness of areas of the primary modulator device is decreased. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A non-transitory electronically-readable medium having code embodied therein that when executed causes an electronic device to:
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evaluate image data representative of an image to be displayed to determine power information associated with portions of a premodulator associated with at least one of a plurality of regions of the image to be displayed; compare the power information to a threshold power value to determine whether the power information indicates an exceedance of the threshold power value; and when the power information indicates an exceedance of the threshold power value, reallocate power within the premodulator to implement a change in brightness of an area of a primary modulator illuminated by the premodulator associated with a particular region and to change modulation by the primary modulator to accommodate the reallocation of power by the premodulator; and
whereinthe step of reallocating power within the premodulator includes reallocating power to selectively decrease the brightness of at least one area of the primary modulator illuminated by the premodulator and to selectively increase the brightness of another area of the primary modulator illuminated by the premodulator; and an aggregate brightness of areas of the primary modulator is decreased. - View Dependent Claims (18, 19, 20)
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Specification